Subject: The Tevatron legacy and the LHC through the lens of single top-quark production

Single top-quark production has provided flagship top-quark measurements at the Tevatron and LHC. These electroweak production modes have small production cross-sections and final states with large backgrounds, challenging the understanding of the detector, while also demanding innovations in analysis techniques. Single top measurements constrain models of new physics directly and indirectly and provide a direct determination of the CKM matrix element Vtb. All this makes single top an excellent representation of the core Tevatron and LHC programs. I will review the history of single top-quark measurements and discuss their role in future LHC runs.